<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
      <h3 class="title">武汉城投停车场监管平台</h3>
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input v-model="loginForm.username" name="username" type="text" auto-complete="on" placeholder="用户名" />
      </el-form-item>
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :type="pwdType"
          v-model="loginForm.password"
          name="password"
          auto-complete="on"
          placeholder="密码"
          @keyup.enter.native="handleLogin" />
        <span class="show-pwd" @click="showPwd">
          <svg-icon icon-class="eye" />
        </span>
      </el-form-item>
      <el-form-item prop="code" class="short-input">
        <el-input
          v-model="loginForm.code"
          name="code"
          auto-complete="on"
          placeholder="验证码"
          @keyup.enter.native="handleLogin" />
        <img src="../../assets/img/code.png" alt="验证码" class="code-img">
      </el-form-item>
      <el-form-item>
        <el-button :loading="loading" type="primary" style="width:100%;" @click.native.prevent="handleLogin">
          登 录
        </el-button>
      </el-form-item>
      <div class="tips">
        <span style="margin-right:20px;">用户名: admin</span>
        <span> 密码: admin</span>
      </div>
    </el-form>
    <div class="foot-record">
      Copyright © 2017-2018   武汉大学 版权所有
      <a class="record-num" target="_blank" href="http://www.miitbeian.gov.cn">
        <img src="../../assets/img/icp.png">
        <span>鄂ICP备18000674号</span>
      </a>
      <a class="record-num" target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=42018502000754">
        <img src="../../assets/img/record_img.jpg">
        <span>鄂公网安备 42018502000754号</span>
      </a>
    </div>
    <div class="video-container">
      <div :style="fixStyle" class="filter"/>
      <video :style="fixStyle" autoplay loop class="fillWidth" @canplay="canplay">
        <source src="../../assets/video/login.mp4" type="video/mp4">
        浏览器不支持 video 标签，建议升级浏览器。
        <source src="../../assets/video/login.mp4" type="video/webm">
        浏览器不支持 video 标签，建议升级浏览器。
      </video>
    </div>
  </div>
</template>

<script>
import { isvalidUsername } from '@/utils/validate'

export default {
  name: 'Login',
  data () {
    const validateUsername = (rule, value, callback) => {
      if (!isvalidUsername(value)) {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    }
    const validatePass = (rule, value, callback) => {
      if (value.length < 5) {
        callback(new Error('密码不能小于5位'))
      } else {
        callback()
      }
    }
    const validateCode = (rule, value, callback) => {
      if (value !== '4035') {
        callback(new Error('验证码不正确'))
      } else {
        callback()
      }
    }
    return {
      vedioCanPlay: false,
      fixStyle: '',
      loginForm: {
        username: 'admin',
        password: 'admin',
        code: '4035'
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePass }],
        code: [{ required: true, trigger: 'blur', validator: validateCode }]
      },
      loading: false,
      pwdType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  mounted: function () {
    window.onresize = () => {
      const windowWidth = document.body.clientWidth
      const windowHeight = document.body.clientHeight
      const windowAspectRatio = windowHeight / windowWidth
      let videoWidth
      let videoHeight
      if (windowAspectRatio < 0.5625) {
        videoWidth = windowWidth
        videoHeight = videoWidth * 0.5625
        this.fixStyle = {
          height: windowWidth * 0.5625 + 'px',
          width: windowWidth + 'px',
          'margin-bottom': (windowHeight - videoHeight) / 2 + 'px',
          'margin-left': 'initial'
        }
      } else {
        videoHeight = windowHeight
        videoWidth = videoHeight / 0.5625
        this.fixStyle = {
          height: windowHeight + 'px',
          width: windowHeight / 0.5625 + 'px',
          'margin-left': (windowWidth - videoWidth) / 2 + 'px',
          'margin-bottom': 'initial'
        }
      }
    }
    window.onresize()
  },
  methods: {
    canplay () {
      this.vedioCanPlay = true
    },
    showPwd () {
      if (this.pwdType === 'password') {
        this.pwdType = ''
      } else {
        this.pwdType = 'password'
      }
    },
    handleLogin () {
      this.$router.push({ path: this.redirect || '/' })
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('Login', this.loginForm).then(() => {
            this.loading = false
            this.$router.push({ path: this.redirect || '/' })
          }).catch(() => {
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style  lang="stylus">
$bg = #2d3a4b;
$light_gray = #eee;

/* reset element-ui css */
.login-container {
  .short-input{
    width: 200px;
    display: inline-block;
    position: relative;
    .code-img{
      position: absolute;
      right: -110px;
      top: 3px;
    }
  }
  .foot-record{
    width: 100%;
    color: #fff;
    position: fixed;
    bottom: 8px;
    z-index: 1000;
    text-align: center;
    line-height: 20px;
    font-size: 12px;
    img{
      position: relative;
      top: 3px;
    }
  }
  .video-container {
    position: relative;
    height: 100vh;
    overflow: hidden;
  }

  .video-container .poster img,
  .video-container video {
    z-index: 0;
    position: absolute;
  }

  .video-container .filter {
    z-index: 1;
    position: absolute;
    background: rgba(0, 0, 0, 0.4);
  }
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;
    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      &:-webkit-autofill {
        -webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: #fff !important;
      }
    }
  }
  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}

</style>

<style  lang="stylus" scoped>
$bg = #2d3a4b;
$dark_gray = #889aa4;
$light_gray = #eee;
.login-container {
  position: fixed;
  height: 100%;
  width: 100%;
  background-color: $bg;
  .login-form {
    position: absolute;
    left: 0;
    right: 0;
    width: 520px;
    max-width: 100%;
    padding: 35px 35px 15px 35px;
    margin: 120px auto;
    z-index: 1000;
  }
  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;
    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }
  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }
  .title {
    font-size: 26px;
    font-weight: 400;
    color: $light_gray;
    margin: 0px auto 40px auto;
    text-align: center;
    font-weight: bold;
  }
  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
